Plastic frame for screens, ventilators, and windows



p i 'ls, 1 3 A. w. MCDONALD PLASTIC FRAME FOR SCREENS, VENTILATOR S', AND WINDOWS 2 Sheets-Sheet 1 Filed July. 26, 1941 April 13, 194 3 -A w McDQNALD 2,316,526

PLASTIC FRAME FOR SCREENS, VENTILATORS, AND WINDOWS Filed July 26, 1941 v 2 Sheets-Sheet 2 terial, whereby to eliminate the plastic frame with moulded in the able plastic such as Patented Apr. 13, 1943 @UNITED, STATES" [PATENT OFFICE PLASTIC FRAME Fon SCREENS. vnNmA'rons, AND wmnows Albert w. McDonald, mm, Ind. Application July 26, 1941, Serial No. 404,241

3 Claims. (cl. nae-332) f The object of my invention is to provide a novel plastic frame for screens, ventilators and windows having the entire frame made of plastic maing any metal; and also to provide aframe that is of lighter weight than metal and which is attractive in appearance, insect proof and inexpensive to manufacture.

It is also an object to provide a plastic sash for screens and ventilators to use at the top and necessity of usframe also has a depression bottom of closets and around ice refrigerators in house trailers, and elsewhere where ventilation is required, and to provide suitable areas for ventilating properly.

1 I attain these and other objects of 'my inven-,

tion by the device illustrated in the accompanying drawings, in which- Figure 1 is a front plan view of the ventilator;

, Fig. 2 is a rear plan view of same; I

Fig. 3 is a section on line 3-3 of Fig. 1;

Fig. 4 is a front plan view of an improved plastic frame for ventilators having an omamental face design molded integral with the plastic frame;

Fig. 5 is a section on line 5-5 of Fig. 4;

Fig. 6 is an edge view of a modified form of the wire screen IS without the frame;

Fig. 7 is a front plan view of another form of the ornamental face design moulded integral with the frame and designed for use especially where a series of aligned ventilators are desired to give increased ventilation area;

Fig. 8 is a substantially central vertical section of Fig. l. v 1

Like numerals designate like parts in each of the several views. y Referring to the drawings, I provide aventilator havinga frame I shape from a suitable opening 2 across which The edge portion the plastic. The frame has suitable apertures frame for the insertion of screws or other fastening elements.

The wire screen preferably is pressed to provide an annular or other ridge 6 spaced an even moulded in the desired plastic, and having an a wire screen.3 extends.

-distance .from the edge of the opening vof the frame. An annular groove v is moulded in the back of the frame, wherein-the edge portion of the screen is pressed integrally into the plastic material of the groove bottom to more securely mount it inthe plastic. I

The frame is compression moulded from a suitphenolic plastic.

l of the screen is embedded in Referring I improved form of my invention, I provide a plastic frame 8 having opposite ears or extensions! in which the screw holes III are positioned. The frame 8 is provided'with ornamental configurations ll extending across its face and formed of plastic material integral with the frame 8. The

I! inits central portion to receive the screen l3. Screen l3 may be mounted with its edges embedded in the plastic screen frame M. This formed with an annular or encircling depression I! formed in the process of moulding, whereby the edge portion of the screen is pressed or further embedded in the plastic frame of the screen. The screen is also provided with annular or encircling recesses l8 formed 'in the process of moulding and whereby the minimum amount of material is used in making the frame. a The screen is formed with an annular or encircling ridge 6, which takes up slack in the screen resulting from expansion during the process of moulding.

As. an alternative to the which the screen wire is moulded in the plastic,

I may provide a screen l8 having its edge portion 19 bent over on the body of the screen to reenforce same as shown in Fig. 6. Either screen i3 or screen ll may be inserted in the depressed portion II of the outer frame and secured there either frictionally or by means of a suitable ades ve. I

Referring to Figs. 7 and 8,there is illustrated a modification of the invention intended for use where a series of ventilators are desired and where a larger area of ventilation is needed. In this form of the invention, I provide a screen frame to with apertures 9a having plastic ribs or ornamental strips Ila integral with the frame and extending across its face. This frame also has recesses lea, whereby to provide a lighter weight frame and save material. Except as its ornamental configuration and the provision of larger ventilation area for a given size screen, it is similar to what has been shown and described in connection with Figs. 4 and 5- 'WhatIclaim'is: g

1. In a ventilator of the type described, the combination of a frame moulded from plastic material, a,wire screen extending across the opening of the frame and the wire screen embedded in the plastic frame, the wire screen having a ridge pressed in it at a predetermined distance from the frame to stiffen the screen and take up slack in the screen.

to Figs. 4 and 5 which illustrate an plastic screen frame is I form of screen in" to receive screws and having the edge portions of 2. In a ventilator of the type described, the combination of a frame'mouldedfrom plastic material, a wire screen extending across the opening of the frame and having the edge portions of the wire screen embedded in the Plastic frame plastic frame,

Bmove formed in the tionsofthe wire screen may hemmed deeper whereby the edze D0 into the plastic material of the frame.

3. In a ventilator combination of a mental still-work exten ina 5 having an over the opening encircling of the type described, the plastic frame having ornalntezral with the frame and of the frame,

portion formed in the back of-the frame to receive a wirescreen, laid wire screen hein: frictionally held in the back of the frame.

ALBERT w HcDONALD. 

